简介:这笔记学习关上的面向的Riemannian3-manifoldM不变的Chern-Simons。,第一成就是建立公式CS(e)鈥?CS()=degAe并且是二(全球)M的框架,和A:(3)M鈫?那么是鈥渄ifference鈥?地图。有趣的现象是为许多3-manifolds的各种各样的框架的Chern-Simons积分的鈥渏umps鈥?是至少二,而不是一个。第二个目的是给CS(e+)和CS的一个明确的代表(e?),在哪儿e+和e吗?假如M3上的鈥渓e英尺鈥?和鈥渞ight鈥?quaternionic框架分别地从沉浸M3鈫?E4被导致。因而,我们在S3(伯杰范围)上发现许多度量标准以便他们不能保角地在E4被嵌入。关键词Chern-Simons不变-伯杰范围-保角的嵌入先生(2000)题目分类53C42-58A15由NSFC支持了(资助Nos.10531090并且10229101)并且江畅学者编程序
简介:Thehomoclinicbifurcationsinfourdimensionalvectorfieldsareinvestigatedbysettingupalocalcoordinatesnearthehomoclinicorbit.Thishomoclinicorbitisnonprincipalinthemeaningsthatitspositivesemi-orbittakesorbitflipanditsunstablefoliationtakesinclinationflip.Theexistence,nonexistence,uniquenessandcoexistenceofthe1-homoclinicorbitandthe1-periodicorbitarestudied.Theexistenceofthetwofoldperiodicorbitandthree-foldperiodicorbitarealsoobtained.
简介:求出了(n-3)-filiform李代数的极大环面,并证明了(n-3)-filiform李代数是可完备化的.
简介:FranklandFürediin[1]conjecturedthatther-graphwithmedgesformedbytakingthefirstmsetsinthecolexorderingofN(r)hasthelargestLagrangianofallr-graphswithmedges.Denotethisr-graphbyCr,mandtheLagrangianofahypergraphbyλ(G).Inthispaper,wefirstshowthatif(3t-1)≤m<(3t),Gisaleft-compressed3-graphwithmedgesandonvertexset[t],thetriplewithminimumcolexorderinginGcis(t—2—i)(t—2)t,thenλ(G)≤λ(C3,m).Asanimplication,theconjectureofFranklandFiirediistruefor(3t)-6≤m≤(3t).
简介:Fornon-negativeintegersi,jandk,wedenotethegeneralizednetasN_(i,j,k),whichisatrianglewithdisjointpathsoflengthi,jandk,attachedtodistinctverticesofthetriangle.Inthispaper,weprovethatevery3-connected{K_(1,3),N_(8-i,i,1}-freegraphishamiltonian,where1≤i≤4.